et/est
https://www.youtube.com/watch?v=d_FyoH0T1Og
https://www.youtube.com/watch?v=xGzG9Qvt71Q
son/sont
https://www.youtube.com/watch?v=tjGIHrEQffQ
https://www.youtube.com/watch?v=BpmPzggcI7g
Connexion :